Which of the following statements best characterizes a euphyll?
A. It differs from a lycophyll by having a branched, rather than a single, vascular system.
B. It is believed to have evolved from a branch that flattened and developed photosynthetic tissue between the branches.
C. It is also called a megaphyll because it is large compared to a lycophyll.
D. It evolved separately from the photosynthetic appendages of moss gametophytes.
E. All of the choices provided are correct.
E. All of the choices provided are correct.
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The main purpose of the Calvin cycle is to produce ________.
A. O2 B. ATP C. Sugar D. CO2
The final characteristics of beer such as color, flavor, and foam primarily depend on the
A. roasted malt. B. adjuncts. C. wort. D. whey.
The scientific work that established DNA, rather than protein, as the molecule of heredity was performed prior to
A) Mendel's work on heredity. B) the elucidation of the double helix structure of DNA. C) Antonie van Leeuwenhoek's observation of internal cell structures. D) the description of the enzymatic steps of glycolysis. E) the formation of the chromosome theory of heredity.
The mechanism that "breaks" the linkage between linked genes is
A) pleiotropy. B) codominance. C) independent assortment. D) crossing over.